My belly

I feel like my belly is so small to be 16w3d, I don’t really eat enough because we barely have food where I’m at right now and I’m not moving till the 19th to be in a better environment for my baby but I try to eat at least 2 times a day and snack on what I can. I worry my tummy so small the baby not growing right and I’ve already lost 7 pounds on the 1st trimester I gained 3 back still in 1st I’m now in 2nd I don’t know how much I weight right now. Yes this is my first pregnancy by the way I’ve always been between 98-105 pounds when pre pregnancy weight was 98 lost 7 dropped to 91 gained 3 last checked at 12w6d I was 94 almost 95.